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2016-12-09BFD: handle timing wheel prematurely firing eventsKlement Sekera1-3/+3
Improve handling of timeouts. Add a workaround for when timing wheel fires an event a tiny amount of time before it should actually be fired. Don't delete unneeded events at all from timing wheel, instead ignoring unexpected events. Enable the skipped BFD test, which passes now. Change-Id: I6ffd4fc0ba7a049ffe63bb0e5290641a7300dd6f Signed-off-by: Klement Sekera <ksekera@cisco.com>
2016-12-09BFD: fix timing in the main loopKlement Sekera1-34/+35
Properly wakeup the main process loop only when necessary to avoid missed events. Improve BFD unit test reliability and speed. Add timestamps to logs and replace Queue with more efficient deque. Change-Id: I01255a02057d3146917b43b669ccdc74f31ef0c8 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2016-12-08BFD: improve ip header handling, fix assertKlement Sekera1-0/+1
Instead of storing a pointer, store an offset within vlib_buffer marking the start of the ip header (similar to storing start of ethernet header). Handle negative timeout in the bfd process main loop. Change-Id: I05a1ff3ac41da5bdc3b2ac6f9e03b3241994688b Signed-off-by: Klement Sekera <ksekera@cisco.com>
2016-12-07BFD: basic asynchronous session up/downKlement Sekera1-0/+273
This is a work-in-progress basic BFD session handling. Only asynchronous mode is supported at the moment. Setting the session flags doesn't work. Change-Id: Idba27f721b5c35be5a66a6d202a63d23ff7ecf6f Signed-off-by: Klement Sekera <ksekera@cisco.com>